Pencil sharpener



Jan. 13. 1 925. 1,522,958

C. H. LAND, JR

PENCIL SHARPENER Filed March 20, 1922 Patented Jan. 13, 1925.

CHARLES H. LAND, an, or nnrnorr mlorrloen, Assronon .OEONE'EHALFTTO;RUDOLF E. Eson, or DETROI MICHIGAN:

rnnoIL sHAnr Nnn.

Application filedM-arch 20; 1922. Serial No. 545,068.

To all whom it may canoe m1 Be it known that 1, CHARLES H. LAND, J r.,citizen of the United States, residing-at Detroit, county of Wayne,State of Michigan, have invented. a certain new and useful improvementin Pencil Sharpeners, and declare the following to be a full, clear, andexact description of the same, such asvvill enable others skilled intheart to which it pertains to make and use the same, reference beinghad to the accompanying drawings, which form a part of thisspecification.

My invention relates to pencil sharpeners shown in the accompanyingdrawingsuand more particularly pointed out in thefollowing specificationand claims,

In draughting rooms or other oilices Where drawing pencils areextensively used the proper sharpening of the pencil point eitherrounded =01 chiseledis a very im portant factor in the preparation ofaccurate drawings, it being essential that the pencil points should beverysharp and properly formed to produce drawings of a highstandand ofexecution.

The usual practice is to sharpen-the leads due tothe-formationandscattering of thedust, necessitating the sharpener beingplaced in an inconvenient location-that the 'drawingmay not be soiled. 7

Such a device for sharpening pencils is also objectionable due to theformation of irregular points resulting-fromthe pencil being held atvariable angles.-

It is therefore the object of the present invention to eliminate theseobjectionable features.

The primary object of the invention isto produce a sharpening device bywhich pencil leads may be rapidly and accurately shaped without dangerof breaking their delicate working edges.

A further object is to produce a sharpening device in which the dustproduced by sharpening the lead is retained within its enclosingwalls;it may therefore be used directly upon the drafting board.

A further object of the invention is to provide a device in which theabrading or cutting surfaces may be easily and quickly renewed whenrequired.

With the foregoing and other objects in View which will appear as thedescription proceeds the invention further resides in the combinationand arrangement of partsan'd in-the details of constructionhereinafterdescribedand claimed, it being llIlClQl'StOOtltllzlt changes may be madein thepreciseembodiment of the inventionherein disclosedwithoutdeparting from the spirit of the same.

In the drawings accompanying this specification:

Figurel is a perspective view of the device with the cover in place.

7 Figure 2 is aperspective view of the device with thecover removedshowing its interiorconstruction.

Figure 3 is a vertical crosssectional view showing a pencil in positionfor sharpening the lead.

Figure 4: is aperspective view of the device showing the elastic bandand abrasive strip divided, in order that both ends may flare to receiveapencil, with one end-of each strip overlapping the adjacent end of theopposing strip.

Referring now to the letters of reference placed upon the drawings A,denotes a rectangular shaped-box fitted with a removable cover-Bhaving aslot B through which-a pencil may be inserted for sharpening. Securedtothe bottom of the box are two opposing-wallsC, C, having flaring ends,constructed of thin resilient sheet metal form ing in cross-section a V-shaped channel betweenthewallsz-one of the walls being relatively longerthan the other. Lodged between thewalls C, C, is a looped rubber-band Dwitlrfiaring ends conforming to the ends of the walls (I, C, with oneend of the band projecting beyond its other end. E, denotes a strip ofabrasive paper or cloth looped at E to conform to the contour and lengthof the rubber band.

In using this device the wood is removed from one end of the pencil toexpose the required length of lead. The pencil is inserted between theopposing abrasive surw. faces by way of the open loop E or between theflaring ends E at the opposite end of the box. The pencil is held insuch a position that the lead only comes between the opposing faces ofthe abrasive material. If a chisel point is desired the pencil isreciprocated back and forth until the lead is given the desired edge. Ifhowever a tapering point is required the pencil is rotated llU as it isreciprocated back and forth until the desired cone-shaped point isobtained.

The walls being constructed of resilient material act as a spring tomaintain opposing walls of the rubber band in proper relation, while thelatter being of soft material.

acts as a cushion ;-thus a point of any desired degree of fineness maybe obtained by varying the depth of the pencil in motion,the rubbercushion overcoming any irregularities due to the reciprocating movementof the pencil. The flare given to the abrasive strip at one end and theopen loop at the opposite end of the box offers ready admission for thelead,while the extended end of the abrasive strip at the flaring endpermits sharpening of the lead in spring bow pencils or compasses.

In Figure 4 both the band and the abrasive strip is shown divided andflaring at each end of the box for the ready admission of a penciL-therubber strip and the abrasive element at one end of the box overlappingthe adjacent end of the opposing rubber strip and abrasive element,whereby the lead of aspring-box pencil or the like may be readilysharpened.

Having thus described my invention what I claim is:

1. In adevice of the character described, a box-like structure; opposingelastic rubber surfaces extending longitudinally within a box-likestructure including a removable slotted cover, a pair of opposingyieldable surfaces extending longitudinally within the box and a pair ofopposing abrasive" strips lodged between the opposing yieldablesurfaces.

4;. In a device of the character described, a box-likestructureincluding a removable slotted cover, a pair of walls formed of resilientsheet metal spaced apart and extending longitudinally within the box, apair of opposing strips of rubber lodged between said resilient wallsandopposing abrasive surfaces, and a pair of opposing abrasive stripslodged betweenthe opposing strips of rubber.

5. Ina device of the cha acter described, a box-like structure includinga removable slotted cover, a pair of rubber bands extendinglongitudinally within the box, and a pair of abrasive strips lodgedbetween the opposing surfaces of the rubber bands.

6..In-a device of the character described,

a box-like structure including a removable slotted cover, rubber bandsextending longitudinally within, the box, resilient means for supportingsaid rubber bands in opposing contiguous relation, and. a pair ofabrasive strips lodged between the opposing surfaces of-the rubber.bands.

7. In a device of the character described, a box-like structureincluding a removable slotted cover, a pair of walls formed of resilientsheet metal spaced apart and extending longitudinally within the box, apair of rubber'bands in opposing contiguous relation with their ends,fiaring apart, and

a pair of strips of abrasive material lodged, between theopposingsurfacesof the rubber bands. i

In testimony, whereof, I sign this specification in the presence of twowitnesses.

CHARLES H. LAND, JR. Witnesses: V S. ETHoMAs.

IDA GOREN.

